I doubt DX12 will address issues like this. Poor CF support in some recent titles have nothing to do with DX11 and everything to do with drivers.
Which is why I said going forward. Have you even read the post?
Soon DX11 will be a thing of the past, and the next big thing will be DX12 games... which are probably going to support the feature. DX12 is win win for AMD and nV in this regard.
Read up a bit on how SLI/xfire is implemented now (there's a post of a game dev that's been quoted a lot on the matter) and read how it'll be under DX12 and you'll see it's apples and oranges, the implementation is completely different and much more predictable.
On topic, so, the 24th is when we get the reviews, right? This 18th is the launch of the 300 series, not Fury/X?